Abstract
Fiber-optic code division multiple access (FO-CDMA) system configuration is introduced. The device losses of active fiber connector, optical encoder/decoder, star coupler, transmission media, power penalty induced by fiber dispersion and the chirp effect of laser source are analyzed. Theoretical analysis of system bit error rate (BER) is achieved. Numerical results show that, dispersion power penalty makes system BER decline. The chirp effect of laser source can compensate for the dispersion power penalty for short transmission distance. For a FO-CDMA system with 20 active users, optical orthogonal code with weight 4 is users' address codes, and the distance between transmitter and receiver is 30 km, if BER is 10 -9 , then the transmitted power requires 4.4 dBm for normal single mode fiber (SMF) and 0.7 dBm for dispersion shift fiber (DSF). The system total loss is 44.9 dB for normal SMF and 41.2 dB for DSF.
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